PageToPoster
Free poster tiling tool
Free printer calibration sheet

Check your printer before the large job.

A one-page test tells you whether 100 mm on screen becomes 100 mm on paper.

Download the 100 mm test square

Print it at Actual size, measure it, and correct your printer settings before using many sheets.

How to get an accurate measurement

  1. Download the correct paper size.Choose A4 or US Letter to match the paper in the printer tray.
  2. Print at Actual size or 100%.Turn off Fit, Shrink, Scale to page, and borderless enlargement.
  3. Measure the outside of the square.It should be 100 mm on both sides. A normal ruler is enough.
  4. Correct the print setting if needed.If the square is 97 mm, the printer scaled the page. Return to the print dialog and remove automatic scaling.